5. Network / Bluetooth / USB
Check the setting
YES
YES
YES
YES
Are the network settings of this unit correct?
Are peripheral devices such as the router and
hub connected to this unit correctly?
Are the router settings correct?
Set the IP address, etc. correctly.
When the static IP address is used, check that no
other devices have the same IP address and that
the subnet mask settings are correct.
Connect the peripheral devices correctly.
Check the instruction manual of the router and
configure the settings correctly.
Check that there are no connection restrictions
by MAC addresses, etc.
5.1. Cannot connect to the network
Is the LAN cable correctly inserted?
Insert the LAN cable correctly and then turn on
the power again.
Check the connection environment
Checking the unit
YES
YES
YES
YES
Can the D3.3V output voltage
(3.3V) to IC741 (DC-DC Conv.)
be confirmed?
Can the voltage (5V) be confirmed between pin
1 of CN741 ?
Is D5V_POWER (IC751 uCOM
85 pin) "Hi" ?
The circuit of D5V_POWER
between IC751 and IC741 are
faulty.
The circuit around IC741(DC-
DC.Conv.) is faulty.
TO "
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Can the NET3.3V output volt-
age (3.3 V) to Q7404 (FET-SW)
be confirmed?
Can the NET1. output voltage
(1.25V) to IC743 (DC-DC Conv.)
be confirmed?
Is E_POWER1 (IC751 uCOM 53
pin) "Hi" ?
Is E_POWER4 (IC751 uCOM 61
pin) "Hi" ?
The circuit of E_POWER1 be-
tween IC751 and Q7404 are
faulty.
The circuit of E_POWER4
between IC751 and IC743 are
faulty.
The circuit around Q7404
(FET-SW) is faulty.
The circuit around IC743(DC-
DC.Conv.) is faulty.
Go to next page.
67
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating